Can I disable a drop down list without using disable in javascript?

Question

I have a drop down list that gets enabled/disabled based on a checkbox onclick. On my debugging my object reference is not set when my checkbox is disabled in my controller.

CONTROLLER

Subject = Request.Form["DetailSelect" + rowID].ToString();

JAVASCRIPT

ddlSelect.disabled = !ddlSelect.disabled;

ASPX

<select = id="detailSelect<%=item.rowID"%> name="DetailSelect<%=item.rowID%>">
     <option value="">--Choose One--</option>
     <option value="Math">Math</option>
     <option value="English">English</option>
     <option value="History">History</option>
</select>

Where do I go to disable my drop down list, without using the disabled toggle in javascript?

Matthew Abbott · Accepted Answer · 2010-07-15 18:28:29Z

1

If you don't use the disabled property, you can do it with an attribute:

<select ... disabled="disabled"></select>

answered Jul 15, 2010 at 18:28

Matthew Abbott

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1 Comment

MrM Over a year ago

Is this accessable in the controller with my Request.Form code?

Neel · Accepted Answer · 2010-07-15 18:47:44Z

1

You can do that via jquery

 $("input[id$='chkbox']").click(function() {  
            $("select[id$='ddl']").attr("disabled", !$(this).is(":checked"));  
       }); });

where chkbox is the Id of the checkbox and ddl is the ID of the drop down list

answered Jul 15, 2010 at 18:47

Neel

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2 Comments

MrM Over a year ago

Is this accessable in the controller with my Request.Form code?

Neel Over a year ago

There is a nice article which tells us why disabled controls are not posted to the web server and explores some of the workarounds to this problem. 4guysfromrolla.com/articles/012506-1.aspx under the heading "Fixing the Disabled Form Fields Problem By Using a "Faux" Disabled State"

MrM · Accepted Answer · 2010-07-16 15:22:57Z

0

I did a little workaround where I used a hidden object and before I disable my drop down in the javascript function, I assign the value to my hidden input.

ASPX

<input id="hiddenSelect" type="hidden" name="HiddenSelect" value="" />

JAVASCRIPT

var ddlSelect = document.getElementById('detailSelect' + rowID).value;
document.getElementById('hiddenSelect').value = ddlSelect;
ddlSelect.disable = !ddlSelect.disabled;

answered Jul 16, 2010 at 15:22

MrM

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